AT42QT1050-UUR

$0.46

Description：5 CHANNEL QTOUCH ADC I2C SNSR IC
Series：QTouch™

SKU:c00118dad088 Category: Sensor, Capacitive Touch Brand: Microchip Technology

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Product introduction

Product Detailed Parameters

Description：5 CHANNEL QTOUCH ADC I2C SNSR IC
Series：QTouch™
Mfr：Microchip Technology
Package：Tape & Reel (TR),Cut Tape (CT),Cut Tape (CT)
Type：Buttons
Proximity Detection：Yes
Number of Inputs：Up to 5
LED Driver Channels：-
Interface：I2C
Resolution：-
Voltage - Supply：1.8V ~ 5.5V
Current - Supply：-
Operating Temperature：-40°C ~ 85°C
Mounting Type：Surface Mount
Package / Case：12-UFBGA, WLCSP
Supplier Device Package：12-WLCSP (1.56x1.4)
Grade：-
Qualification：-

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AT42QT1050-UUR

Overview

The AT42QT1050-UUR is a five-channel QTouchADC capacitive touch sensor IC manufactured by Microchip Technology. It supports configurations of one to five keys or up to four keys plus a guard channel. The device operates on a power supply voltage ranging from 1.8 V to 5.5 V and communicates via an I2C interface with a maximum clock rate of 400 kHz. It is available in a 12-ball WLCSP package, specifically the UUR suffix variant. Key signal processing features include self-calibration, auto-drift compensation, noise filtering, and Adjacent Key Suppression (AKS).

Feature Summary

Patented spread-spectrum QTouchADC charge-transfer technology for enhanced noise immunity.
Integrated signal processing including self-calibration, auto-drift compensation, and noise filtering.
Supports Adjacent Key Suppression (AKS) to prevent false detection on tightly spaced keys.
Configurable Low Power (LP) mode supporting both Low Power and Deep Sleep states.

Applications

Consumer electronics requiring single-layer capacitive touch interfaces.
Industrial control panels needing high environmental stability.
Appliances utilizing plastic or glass overlays up to specified thicknesses.

Procurement Notes

Verify the specific UUR ordering suffix corresponds to the 12-ball WLCSP package configuration. Confirm that the host system supports the required I2C protocol at 400 kHz. Ensure hardware design adheres to the recommended series resistor values for ESD protection and RFI suppression as detailed in the official datasheet.

Selection Notes

Select this component when a solution supporting up to five independent touch keys is required within a minimal footprint. The UUR package variant is suitable for applications prioritizing small board space over larger leaded packages. Consider the internal pull-up resistors and external CHANGE line requirements for proper interrupt handling in the host microcontroller design.

Part Context

The AT42QT1050 belongs to the QTouch family of capacitive sensing controllers. It utilizes Atmel's proprietary QTouchADC acquisition method, which eliminates the need for external sampling capacitors. This integration simplifies the bill of materials and reduces the overall component count compared to discrete sensing solutions.